Invention Grant
- Patent Title: Constant current circuit and semiconductor integrated circuit
- Patent Title (中): 恒流电路和半导体集成电路
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Application No.: US13328884Application Date: 2011-12-16
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Publication No.: US08575999B2Publication Date: 2013-11-05
- Inventor: Sadanori Akiya
- Applicant: Sadanori Akiya
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Main IPC: G05F1/10
- IPC: G05F1/10 ; G05F3/02
Abstract:
In a constant current circuit, a drain terminal is connected to an output terminal of a current, and a gate voltage operable in a saturation region is applied to a source-grounded transistor. An increase current generating circuit generates an increase current equivalent to an increase of a current due to a channel length modulation effect of the transistor. A current mirror circuit generates a current having the same value as that of the increase current generated by the increase current generating circuit and supplies the generated current to the drain terminal of the transistor.
Public/Granted literature
- US20120086503A1 CONSTANT CURRENT CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT Public/Granted day:2012-04-12
Information query
IPC分类:
